How soon after sex is an egg fertilized? How soon after fertilization will your basal body temperature rise and implatation bleeding appear?

Varies. The egg typical survives and awaits fertilization in the reproductive tract for up to 24 hours. Basal body temperature rises not from fertilization but from the increase in Progesterone as a result of the lh surge at the time of ovluation. This surge is what is detected in home ovulation predictor kits. Implantation bleeding is inconsistent sign of pregnancy but can occur 1week after fertilizes.